CA1067150A - Output regulator for a thermal power-producing plant - Google Patents
Output regulator for a thermal power-producing plantInfo
- Publication number
- CA1067150A CA1067150A CA247,027A CA247027A CA1067150A CA 1067150 A CA1067150 A CA 1067150A CA 247027 A CA247027 A CA 247027A CA 1067150 A CA1067150 A CA 1067150A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- output
- value signal
- receive
- desired value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003111 delayed effect Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000004075 alteration Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2200/00—Mathematical features
- F05D2200/10—Basic functions
- F05D2200/12—Subtraction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Combustion (AREA)
- Feedback Control In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of Turbines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The regulator having a P-member and an I-member uses a timing means to delay the desired value signal prior to subtraction of the delayed signal from the received actual value signal. The resultant signal is then delivered to the I-member. A further P-member is also used to receive the desired value signal and to deliver the signal for addition to the superimposed signals from the first-named P-member and I-member in order to produce a load-control signal.
The regulator having a P-member and an I-member uses a timing means to delay the desired value signal prior to subtraction of the delayed signal from the received actual value signal. The resultant signal is then delivered to the I-member. A further P-member is also used to receive the desired value signal and to deliver the signal for addition to the superimposed signals from the first-named P-member and I-member in order to produce a load-control signal.
Description
1067~5 :
This invention relates to an output regulator for a - ~
thermal power-producing plant. -As is known, thermal power-producing plants frequently use output regulators of the PID type in which an actual value signal dependent on the output power is compared to a desired value signal so that an outlet load-control signal can be produced to regulate the plant should there be deviations from the desired value signal. Generally, the transmission factors of the P-, I- and D-portions of the output-regulator `
; 10 are selected so that disturbances, e.g. a change in the grade ; of fuel, which affect the fire are rectified in optimum fashion. However, in the case of an abrupt alteration of the desired value signal, a very large deviation of the load-control signal occurs momenta~ily in the signal line between the output-regulator and the boiler load-controller. Usually, - such a large deviation cannot be accepted in the combustion ,- system to avoid that the required burner load exceeds the normal operation range.- Thus, it becomes necessary to impose suitable limits on the gradients for the load-change or for the load-control signal.' Both these means, however, have the drawback that they considerably delay a load-change.
. . .
Accordingly, it is an object of the invention to - improve the output regulator used in thermal power plants.
It is another object of the invention to provide an ~; output regulator for a thermal power plant which optimizes the ''`,! regulation of the plant even in the event of an abrupt - alteration in the desired value of the ou~put.
~ In general terms, the present invention provides, ;`~ in one aspect thereof, an output regulator for a thermal power-producing plant comprising a pair of inputs; an output ,:
for emitting a load control signal; a first P-member connected to one of said inputs to receive an actual value signal; an 1067~S0 I-member connected to said one input to receive said actual value signal; a second P-member connected to the other input of said inputs to receive a desired value signal, said second P-member having a smaller transmission factor than said first ~ P-member; a timing means connected to said other input for ; receiving and delaying said desired value signal, said timing means being connected to said I-member to emit the delayed desired value signal to said I-member; an addition means i connected to said first P-member and said I-member to receive ; 10 superimposed signals therefrom, said second P-member being connected to said addition means to deliver said desired value signal to said addition means for addition to said superimposed signals to produce the load control signal in response thereto, said addition means being connected to said output to deliver the load control signal thereto.
In accordance with one embodiment, at least one of the two P-members is also of D-cparacter. Also, ~he retardation-time of the timing means;is preferably adjustable.
, :.
In another aspect, the present invention provides an output regulator for a thermal power-producing plant comprising ., ,~. .. - .
a pair of inputs and an output; a first P-member connected to one of said inputs to receive an actuàl value signal therefrom;
a second P-member connected to the other of said inputs to receive a desired value signal therefrom; a timing means connected to said other input to receive and delay said desired value signal; a comparison means connected to said one input and said timing means to subtract the delayed desired value signal from the actual value signal to produce a resultant signal; an I-member connected to said comparison means to receive the resultant signal; a first addition means connected to said first P-member and said I-member to superimpose signals received therefrom; and a second addition means connected to . ~, said first addition means and said second P-member to add said ~`
superimposed signals and said desired value signal to produce a load-control signal for delivery to said output.
These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims taken in conjunction with the accompanying drawings in which:
Fig. 1 illustrates a schematic diagram of a thermal power plant utilizing an output regulator of known construction;
" ~.
Fig. 2 illustrates a circuit diagram of an output regulator according to the invention; and Fig. 3 graphically illustrates the manner of operation -; of the regulator of Fig. 2 Referring to Fig. 1, a steam power plant operated by ; fo~sil uels utilizes a feed-water tank 1, a feed-pump 2, two '~ high-pressure preheaters-3, a feed-valve 5, an economizer 6, an evaporating-surface 7~, a superheating-surface 8, a live-, ~ steam valve 9, a steam-turbine 10 having an electric generator -',: , , ;
11, a condenser 12, a condensate-pump 13, and a low-pressure preheater 14. The heating surfaces 6, 7 and 8, are situated in a housing 20 of the steam generator, and are heated by a burner 21. Fuel is conducted to the burner 21 through a conduit 4, which-has a valve 22 for adjustinq the quantity of fuel. The supply of air to the burner is not shown but can also be regulated by a valve.
The feed-valve S is influenced by a regulator 26, which is associated with a temperature-senser 25 near the superheating surface 8. -A pressure-senser 28 is connected ~, .
`~ in the flow direction of the steam ahead of the live-steam valve 9 and controls the live-steam valve 9 via a pressure-regulator 29. The power supplied by the electric generator 11 to a network 30 is determined by a power-measuring device 32, which through the intermediary of an output-regulator 33 of PID type influences a boilér-load-controller 36. The output regulator 33 receives a desired value Nsover a signal line 34. The valve 22 in the fuel supply line 4 is operated from the load-controller 36. Additional devices, such as the . regulator 26, the not-shown valve for adjusting the air : supply, or the not-shown injection valve for regulating the ; temperature of the live steam, may be also operated from the load-controller 36.
. 10 Referring to Fig. 2, the- output regulator is shown connected to a controlled system 50 representative of the : dynamic characteristics of the steam generator, steam turbine .. and electric generator of Fig. 1. The regulator has two inputs and one output~ As shown, the controlled system 50 delivers an actual value signal N.via a signal-path 51 to one ~
input of the regulator which path branches at a point 52. One .
branch connects the point 52 to the input of a PD-member 53 while the other branch connects the point 52 to a comparison means 64, which is connected with the input of an I-member 54. The outputs of the PD-member 53 and of the I-member 54 : are brought together in an addition-means 55, in which there ~.
is a super-imposition of the output signals of the two members 53, 54. The PD-member 53 and the I-member 54 are as usual adjusted in optimum fashion to the controlled system 50. ~
A signal-path 60 which conducts the desired-value .
signal Ns is branched at a point 61. One branch connects point 61 to a timing means 63, which is connected with the comparison means 64 at the input of the I-member 54. In this comparison means 64 the retarded (i.e. delayed) desired . 30 value signal coming from the timing means 63 is compared through subtraction with the actual-value signal of the output coming from the branch point 52, and the difference of these ~067~
two signals is conducted to the I-member 54. The other ' branch leaving the point 61 runs to a further PD-member 62, ~
which is connected with an adaition means 5,7, to which the ' signal coming from the addition means 55 is conducted over a signal line 56. The PD-member 62 has a smaller transmission factor than the PD-member 53, and also the D-portion is weaker. At the addition means 57, the signal formed from the superposing of the outputs from two members 53, 54 is super-posed on the signal from the PD-member 62, and the thus-fol..~d sum is conducted to the controlled system 50 as a load-control signal f. -Referring to Fig. 3, in operation, assuming that an abrupt change of the output desired-value Ns occurs at the ' time t = o of Fig. 3a, the de of operation of the output regulator of Fig. 2 is as follows. In the diagram 3b are two examples of characteristics Gl, G2, o the timing means 63, thus showing simultaneously two variants of the pattern of the output signal of the timing means 63 at the occurrence of the abrupt change of the desired-value output. In the diagram 3c ,' is shown by the curves Ll and L2 the pattern of the load-control signal f corresponding to the pattern of the charac-P
teristics Gl and G2 respectively. The diagram 3d shows the pattern of the actual-values Nl and N2 of the output at the occurrence of the abrupt alteration of the output desired-value Ns.
For comparison, the diagram 3c shows additionally the pattern of the load-signal'f of the known output regulator -as a curve Lo~ and the diagram 3d shows the corresponding pattern of the actual-value of the output as the curve No.
An optimal adjustment of the D-portion in the known output-regulator 33 produces a very great initial deviation of the load-control signal f, which corresponds to the pattern of the curve Lo. However, the ordinary control of the burner 21 is not able to realize the deviation of the curve Lo. Thus, the load-control signal f must be limited to a value LmaX, so that the dotted pattern of the curve Lo is not followed. ,The relatively great amplification of the P- and I-portions of the known output-regulator has the result that the curve Lo, following the initial deviation, falls below the O-line. As a result, the actual-value signal No rises to the steady-state value (Fig. 3d) only after a considerable delay.
With the output-regulator according to Fig. 2, the ; -' required rise of output caused by the abrupt alteration of ; the desired-value signal Ns is reached considerably earlier than with the known output-regulator. This is clearly seen in the diagrams 3c and 3d from the curves Ll, L2, and Nl, N2 re~pectively. Here the control system is much less affected, because, as the two diagrams show, the deviations of the curves Ll and L2 and Nl and N2 respectively, are much less.
As is further shown by Fig. 3, the character of the timing means 63 can be altered within relatively wide limits without substantially impairing the favorable action of the output-regulator. This al~eration is effected by adjusting the delay-time of the timing means 63.
It is also possible for the member 53 or the member 62 to be only of P-character, or for both members to be only of P-character.
The term "P-member" means a controller with proportional action, the term "I-member" a controller with integral action and the term "PD-member" a controller with proportional plus derivative actions.
. , ... ..
...., .~
This invention relates to an output regulator for a - ~
thermal power-producing plant. -As is known, thermal power-producing plants frequently use output regulators of the PID type in which an actual value signal dependent on the output power is compared to a desired value signal so that an outlet load-control signal can be produced to regulate the plant should there be deviations from the desired value signal. Generally, the transmission factors of the P-, I- and D-portions of the output-regulator `
; 10 are selected so that disturbances, e.g. a change in the grade ; of fuel, which affect the fire are rectified in optimum fashion. However, in the case of an abrupt alteration of the desired value signal, a very large deviation of the load-control signal occurs momenta~ily in the signal line between the output-regulator and the boiler load-controller. Usually, - such a large deviation cannot be accepted in the combustion ,- system to avoid that the required burner load exceeds the normal operation range.- Thus, it becomes necessary to impose suitable limits on the gradients for the load-change or for the load-control signal.' Both these means, however, have the drawback that they considerably delay a load-change.
. . .
Accordingly, it is an object of the invention to - improve the output regulator used in thermal power plants.
It is another object of the invention to provide an ~; output regulator for a thermal power plant which optimizes the ''`,! regulation of the plant even in the event of an abrupt - alteration in the desired value of the ou~put.
~ In general terms, the present invention provides, ;`~ in one aspect thereof, an output regulator for a thermal power-producing plant comprising a pair of inputs; an output ,:
for emitting a load control signal; a first P-member connected to one of said inputs to receive an actual value signal; an 1067~S0 I-member connected to said one input to receive said actual value signal; a second P-member connected to the other input of said inputs to receive a desired value signal, said second P-member having a smaller transmission factor than said first ~ P-member; a timing means connected to said other input for ; receiving and delaying said desired value signal, said timing means being connected to said I-member to emit the delayed desired value signal to said I-member; an addition means i connected to said first P-member and said I-member to receive ; 10 superimposed signals therefrom, said second P-member being connected to said addition means to deliver said desired value signal to said addition means for addition to said superimposed signals to produce the load control signal in response thereto, said addition means being connected to said output to deliver the load control signal thereto.
In accordance with one embodiment, at least one of the two P-members is also of D-cparacter. Also, ~he retardation-time of the timing means;is preferably adjustable.
, :.
In another aspect, the present invention provides an output regulator for a thermal power-producing plant comprising ., ,~. .. - .
a pair of inputs and an output; a first P-member connected to one of said inputs to receive an actuàl value signal therefrom;
a second P-member connected to the other of said inputs to receive a desired value signal therefrom; a timing means connected to said other input to receive and delay said desired value signal; a comparison means connected to said one input and said timing means to subtract the delayed desired value signal from the actual value signal to produce a resultant signal; an I-member connected to said comparison means to receive the resultant signal; a first addition means connected to said first P-member and said I-member to superimpose signals received therefrom; and a second addition means connected to . ~, said first addition means and said second P-member to add said ~`
superimposed signals and said desired value signal to produce a load-control signal for delivery to said output.
These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims taken in conjunction with the accompanying drawings in which:
Fig. 1 illustrates a schematic diagram of a thermal power plant utilizing an output regulator of known construction;
" ~.
Fig. 2 illustrates a circuit diagram of an output regulator according to the invention; and Fig. 3 graphically illustrates the manner of operation -; of the regulator of Fig. 2 Referring to Fig. 1, a steam power plant operated by ; fo~sil uels utilizes a feed-water tank 1, a feed-pump 2, two '~ high-pressure preheaters-3, a feed-valve 5, an economizer 6, an evaporating-surface 7~, a superheating-surface 8, a live-, ~ steam valve 9, a steam-turbine 10 having an electric generator -',: , , ;
11, a condenser 12, a condensate-pump 13, and a low-pressure preheater 14. The heating surfaces 6, 7 and 8, are situated in a housing 20 of the steam generator, and are heated by a burner 21. Fuel is conducted to the burner 21 through a conduit 4, which-has a valve 22 for adjustinq the quantity of fuel. The supply of air to the burner is not shown but can also be regulated by a valve.
The feed-valve S is influenced by a regulator 26, which is associated with a temperature-senser 25 near the superheating surface 8. -A pressure-senser 28 is connected ~, .
`~ in the flow direction of the steam ahead of the live-steam valve 9 and controls the live-steam valve 9 via a pressure-regulator 29. The power supplied by the electric generator 11 to a network 30 is determined by a power-measuring device 32, which through the intermediary of an output-regulator 33 of PID type influences a boilér-load-controller 36. The output regulator 33 receives a desired value Nsover a signal line 34. The valve 22 in the fuel supply line 4 is operated from the load-controller 36. Additional devices, such as the . regulator 26, the not-shown valve for adjusting the air : supply, or the not-shown injection valve for regulating the ; temperature of the live steam, may be also operated from the load-controller 36.
. 10 Referring to Fig. 2, the- output regulator is shown connected to a controlled system 50 representative of the : dynamic characteristics of the steam generator, steam turbine .. and electric generator of Fig. 1. The regulator has two inputs and one output~ As shown, the controlled system 50 delivers an actual value signal N.via a signal-path 51 to one ~
input of the regulator which path branches at a point 52. One .
branch connects the point 52 to the input of a PD-member 53 while the other branch connects the point 52 to a comparison means 64, which is connected with the input of an I-member 54. The outputs of the PD-member 53 and of the I-member 54 : are brought together in an addition-means 55, in which there ~.
is a super-imposition of the output signals of the two members 53, 54. The PD-member 53 and the I-member 54 are as usual adjusted in optimum fashion to the controlled system 50. ~
A signal-path 60 which conducts the desired-value .
signal Ns is branched at a point 61. One branch connects point 61 to a timing means 63, which is connected with the comparison means 64 at the input of the I-member 54. In this comparison means 64 the retarded (i.e. delayed) desired . 30 value signal coming from the timing means 63 is compared through subtraction with the actual-value signal of the output coming from the branch point 52, and the difference of these ~067~
two signals is conducted to the I-member 54. The other ' branch leaving the point 61 runs to a further PD-member 62, ~
which is connected with an adaition means 5,7, to which the ' signal coming from the addition means 55 is conducted over a signal line 56. The PD-member 62 has a smaller transmission factor than the PD-member 53, and also the D-portion is weaker. At the addition means 57, the signal formed from the superposing of the outputs from two members 53, 54 is super-posed on the signal from the PD-member 62, and the thus-fol..~d sum is conducted to the controlled system 50 as a load-control signal f. -Referring to Fig. 3, in operation, assuming that an abrupt change of the output desired-value Ns occurs at the ' time t = o of Fig. 3a, the de of operation of the output regulator of Fig. 2 is as follows. In the diagram 3b are two examples of characteristics Gl, G2, o the timing means 63, thus showing simultaneously two variants of the pattern of the output signal of the timing means 63 at the occurrence of the abrupt change of the desired-value output. In the diagram 3c ,' is shown by the curves Ll and L2 the pattern of the load-control signal f corresponding to the pattern of the charac-P
teristics Gl and G2 respectively. The diagram 3d shows the pattern of the actual-values Nl and N2 of the output at the occurrence of the abrupt alteration of the output desired-value Ns.
For comparison, the diagram 3c shows additionally the pattern of the load-signal'f of the known output regulator -as a curve Lo~ and the diagram 3d shows the corresponding pattern of the actual-value of the output as the curve No.
An optimal adjustment of the D-portion in the known output-regulator 33 produces a very great initial deviation of the load-control signal f, which corresponds to the pattern of the curve Lo. However, the ordinary control of the burner 21 is not able to realize the deviation of the curve Lo. Thus, the load-control signal f must be limited to a value LmaX, so that the dotted pattern of the curve Lo is not followed. ,The relatively great amplification of the P- and I-portions of the known output-regulator has the result that the curve Lo, following the initial deviation, falls below the O-line. As a result, the actual-value signal No rises to the steady-state value (Fig. 3d) only after a considerable delay.
With the output-regulator according to Fig. 2, the ; -' required rise of output caused by the abrupt alteration of ; the desired-value signal Ns is reached considerably earlier than with the known output-regulator. This is clearly seen in the diagrams 3c and 3d from the curves Ll, L2, and Nl, N2 re~pectively. Here the control system is much less affected, because, as the two diagrams show, the deviations of the curves Ll and L2 and Nl and N2 respectively, are much less.
As is further shown by Fig. 3, the character of the timing means 63 can be altered within relatively wide limits without substantially impairing the favorable action of the output-regulator. This al~eration is effected by adjusting the delay-time of the timing means 63.
It is also possible for the member 53 or the member 62 to be only of P-character, or for both members to be only of P-character.
The term "P-member" means a controller with proportional action, the term "I-member" a controller with integral action and the term "PD-member" a controller with proportional plus derivative actions.
. , ... ..
...., .~
Claims (5)
1. An output regulator for a thermal power-producing plant comprising a pair of inputs;
an output for emitting a load control signal;
a first P-member connected to one of said inputs to receive an actual value signal;
an I-member connected to said one input to receive said actual value signal;
a second P-member connected to the other input of said inputs to receive a desired value signal, said second P-member having a smaller transmission factor than said first P-member;
a timing means connected to said other input for receiving and delaying said desired value signal, said timing means being connected to said I-member to emit the delayed de-sired value signal to said I-member;
an addition means connected to said first P-member and said I-member to receive superimposed signals there-from, said second P-member being connected to said addition means to deliver said desired value signal to said addition means for addition to said superimposed signals to produce the load control signal in response thereo, said addition means being connected to said output to deliver the load control signal thereto.
an output for emitting a load control signal;
a first P-member connected to one of said inputs to receive an actual value signal;
an I-member connected to said one input to receive said actual value signal;
a second P-member connected to the other input of said inputs to receive a desired value signal, said second P-member having a smaller transmission factor than said first P-member;
a timing means connected to said other input for receiving and delaying said desired value signal, said timing means being connected to said I-member to emit the delayed de-sired value signal to said I-member;
an addition means connected to said first P-member and said I-member to receive superimposed signals there-from, said second P-member being connected to said addition means to deliver said desired value signal to said addition means for addition to said superimposed signals to produce the load control signal in response thereo, said addition means being connected to said output to deliver the load control signal thereto.
2. An output regulator as set forth in claim 1 wherein at least one of said P-members also has a D-character.
3. An output regulator as set forth in claim 2 wherein said timinq means is adjustable.
4. An output regulator as set forth in claim 1 wherein said timing means is adjustable.
5. An output regulator for a thermal power-producing plant comprising a pair of inputs and an output;
a first P-member connected to one of said inputs to receive an actual value signal therefrom;
a second P-member connected to the other of said inputs to receive a desired value signal therefrom;
a timing means connected to said other input to receive and delay said desired value signal;
a comparison means connected to said one input and said timing means to subtract the delayed desired value sig-nal from the actual value signal to produce a resultant signal;
an I-member connected to said comparison means to receive the resultant signal;
a first addition means connected to said first P-member and said I-member to superimpose signals received therefrom; and a second addition means connected to said first addition means and said second P-member to add said superimposed signals and said desired value signal to produce a load-control signal for delivery to said output.
a first P-member connected to one of said inputs to receive an actual value signal therefrom;
a second P-member connected to the other of said inputs to receive a desired value signal therefrom;
a timing means connected to said other input to receive and delay said desired value signal;
a comparison means connected to said one input and said timing means to subtract the delayed desired value sig-nal from the actual value signal to produce a resultant signal;
an I-member connected to said comparison means to receive the resultant signal;
a first addition means connected to said first P-member and said I-member to superimpose signals received therefrom; and a second addition means connected to said first addition means and said second P-member to add said superimposed signals and said desired value signal to produce a load-control signal for delivery to said output.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH489675A CH590401A5 (en) | 1975-04-17 | 1975-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1067150A true CA1067150A (en) | 1979-11-27 |
Family
ID=4284413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA247,027A Expired CA1067150A (en) | 1975-04-17 | 1976-03-03 | Output regulator for a thermal power-producing plant |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4049971A (en) |
| JP (1) | JPS6014163B2 (en) |
| BE (1) | BE840863A (en) |
| CA (1) | CA1067150A (en) |
| CH (1) | CH590401A5 (en) |
| DE (1) | DE2518158B2 (en) |
| FI (1) | FI58988C (en) |
| FR (1) | FR2308136A1 (en) |
| GB (1) | GB1485247A (en) |
| IT (1) | IT1059718B (en) |
| NL (1) | NL173877C (en) |
| SE (1) | SE426750B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2627591B2 (en) * | 1976-06-19 | 1981-04-16 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Control device for turbines with speed and power control |
| JPS60277B2 (en) * | 1977-12-28 | 1985-01-07 | 株式会社トキメック | Marine automatic steering system |
| GB2038039B (en) * | 1978-12-11 | 1983-08-17 | Matsushita Electric Ind Co Ltd | Automatic temperature control of water heater |
| DE3100126C2 (en) * | 1980-12-05 | 1985-04-04 | Gebrüder Sulzer AG, Winterthur | Controller with a setpoint / actual value comparator |
| DE3228996A1 (en) * | 1982-08-03 | 1984-02-09 | Siemens AG, 1000 Berlin und 8000 München | METHOD AND DEVICE FOR CONTROLLING THE POWER ON A POWER PLANT |
| US4489562A (en) * | 1982-11-08 | 1984-12-25 | Combustion Engineering, Inc. | Method and apparatus for controlling a gasifier |
| DE10001995A1 (en) | 2000-01-19 | 2001-07-26 | Alstom Power Schweiz Ag Baden | Method for setting or regulating the steam temperature of the live steam and / or reheater steamer in a composite power plant and composite power plant for carrying out the method |
| EP1607586A1 (en) * | 2004-05-06 | 2005-12-21 | Siemens Aktiengesellschaft | Arrangement of a steam power plant |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH470576A (en) * | 1967-02-06 | 1969-03-31 | Sulzer Ag | Method for controlling a heating steam power plant |
| US3421014A (en) * | 1967-08-29 | 1969-01-07 | Boris Petrovich Moorganov | Apparatus for controlling operation of turbogenerator under emergency conditions in the power system |
| US3545207A (en) * | 1969-07-23 | 1970-12-08 | Leeds & Northrup Co | Boiler control system |
| US3609384A (en) * | 1969-09-03 | 1971-09-28 | Electrodyne Res Corp | Control means for stabilizing a steam-driven reheat-type turbine generator after sudden runback of electric generation |
| US3619631A (en) * | 1970-08-21 | 1971-11-09 | Electrodyne Res Corp | Tracking means for a steam electric generating plant automatic control system |
| JPS4962801A (en) * | 1972-10-14 | 1974-06-18 |
-
1975
- 1975-04-17 CH CH489675A patent/CH590401A5/xx not_active IP Right Cessation
- 1975-04-24 DE DE2518158A patent/DE2518158B2/en not_active Withdrawn
- 1975-05-21 NL NLAANVRAGE7505971,A patent/NL173877C/en not_active IP Right Cessation
-
1976
- 1976-01-29 US US05/653,595 patent/US4049971A/en not_active Expired - Lifetime
- 1976-02-20 SE SE7602061A patent/SE426750B/en not_active IP Right Cessation
- 1976-02-20 FI FI760431A patent/FI58988C/en not_active IP Right Cessation
- 1976-03-03 CA CA247,027A patent/CA1067150A/en not_active Expired
- 1976-04-05 JP JP51038083A patent/JPS6014163B2/en not_active Expired
- 1976-04-13 IT IT22243/76A patent/IT1059718B/en active
- 1976-04-15 GB GB15660/76A patent/GB1485247A/en not_active Expired
- 1976-04-16 FR FR7611425A patent/FR2308136A1/en active Granted
- 1976-04-16 BE BE166246A patent/BE840863A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1059718B (en) | 1982-06-21 |
| NL173877C (en) | 1984-03-16 |
| JPS51126445A (en) | 1976-11-04 |
| DE2518158B2 (en) | 1979-02-01 |
| NL7505971A (en) | 1976-10-19 |
| SE7602061L (en) | 1976-10-18 |
| FR2308136B1 (en) | 1980-03-07 |
| CH590401A5 (en) | 1977-08-15 |
| FI58988C (en) | 1981-05-11 |
| FR2308136A1 (en) | 1976-11-12 |
| GB1485247A (en) | 1977-09-08 |
| FI760431A (en) | 1976-10-18 |
| BE840863A (en) | 1976-10-18 |
| NL173877B (en) | 1983-10-17 |
| SE426750B (en) | 1983-02-07 |
| US4049971A (en) | 1977-09-20 |
| JPS6014163B2 (en) | 1985-04-11 |
| FI58988B (en) | 1981-01-30 |
| DE2518158A1 (en) | 1976-11-25 |
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